12801986 has 8 divisors (see below), whose sum is σ = 20332620. Its totient is φ = 6024448.

The previous prime is 12801983. The next prime is 12801989. The reversal of 12801986 is 68910821.

12801986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12801983) and next prime (12801989).

It can be written as a sum of positive squares in 2 ways, for example, as 12285025 + 516961 = 3505^2 + 719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12801983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188231 + ... + 188298.

Almost surely, 2^12801986 is an apocalyptic number.

12801986 is a deficient number, since it is larger than the sum of its proper divisors (7530634).

12801986 is a wasteful number, since it uses less digits than its factorization.

12801986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376548.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 12801986 is about 3577.9863051722. The cubic root of 12801986 is about 233.9335165548.

The spelling of 12801986 in words is "twelve million, eight hundred one thousand, nine hundred eighty-six".